/*
 * Copyright 2022-2025 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.instancio.test.features.cartesianproduct;

import org.instancio.Instancio;
import org.instancio.junit.InstancioExtension;
import org.instancio.test.support.pojo.person.Gender;
import org.instancio.test.support.pojo.person.Person;
import org.instancio.test.support.tags.Feature;
import org.instancio.test.support.tags.FeatureTag;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

import static org.assertj.core.api.Assertions.assertThat;
import static org.instancio.Select.all;
import static org.instancio.Select.field;

@FeatureTag({Feature.CARTESIAN_PRODUCT, Feature.ON_COMPLETE})
@ExtendWith(InstancioExtension.class)
class CartesianProductOnCompleteTest {

    @Test
    void shouldInvokeCallbackForEachValue() {
        final List<Gender> genders = new ArrayList<>();

        Instancio.ofCartesianProduct(Person.class)
                .with(field(Person::getGender), Gender.FEMALE, Gender.MALE)
                .with(field(Person::getAge), 30, 40)
                .onComplete(field(Person::getGender), (Gender g) -> genders.add(g))
                .create();

        assertThat(genders).containsExactly(Gender.FEMALE, Gender.FEMALE, Gender.MALE, Gender.MALE);
    }

    @Test
    void shouldInvokeCallbackOncePerEachCartesianProductResult() {
        final AtomicInteger callbackCount = new AtomicInteger();

        Instancio.ofCartesianProduct(Person.class)
                .with(field(Person::getGender), Gender.FEMALE, Gender.MALE)
                .with(field(Person::getAge), 30, 40)
                .onComplete(all(Person.class), val -> callbackCount.incrementAndGet())
                .create();

        assertThat(callbackCount).hasValue(4);
    }
}
